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Original starter checks with explanations and misconception prompts. These short quizzes sample key ideas; they are not full exam-board assessments or predicted grades.

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Cells · Question 1

Which structure controls what enters and leaves a cell?Cell membraneNucleusRibosomeCytoplasm

Transport · Question 2

What is diffusion?Movement against a concentration gradient using energyNet movement down a concentration gradientMovement only through a cell membraneMovement of water only

Respiration · Question 3

Which statement about respiration is correct?It occurs only at nightIt is the same as breathingIt transfers energy from chemical stores in cellsPlants never respire

Photosynthesis · Question 4

Which substances are the reactants in photosynthesis?Glucose and oxygenCarbon dioxide and waterOxygen and waterGlucose and carbon dioxide

Inheritance · Question 5

For Aa × Aa, what is the probability of aa?01/21/43/4

Immunity · Question 6

What do vaccines usually provide?A ready-made cure for every infectionAntigens that stimulate an immune responseAntibiotics that kill virusesAn immediate permanent barrier to all pathogens

Sampling · Question 7

Why use random quadrat positions?To guarantee identical countsTo remove all uncertaintyTo reduce selection biasTo count only the largest plants

Ecosystems · Question 8

What happens to energy along a food chain?It is endlessly recycledSome is transferred to surroundings at each trophic levelAll passes into the next organismIt is created by consumers

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Answer explanations are original app content. Linked OpenStax chapters provide supporting reading; check your course specification and teacher’s resources for assessed detail.